Just a commentary on your methodology, not your product - I'm not sure I appreciate a submission to HN that goes to a URL that (on an iOS device at least) opens straight to the App Store app page (even if it is free).
I'm reading HN on my iPhone using one of the various alternative mobile interfaces running in Safari. Clicking your link, to learn anything about what you made, requires switching to the App Store. Completely disrupts my normal news flow.
... Is there a reason you don't have a one page splash covering the highlights and features of the app? Can anyone without an iOS device even learn what you've done?